Wiktionary
digoxigenin
n. (context biology English) A steroid found exclusively in the flowers and leaf of the plants ''Digitalis purpurea'' and ''Digitalis lanata''.
Wikipedia
Digoxigenin
Digoxigenin (DIG) is a steroid found exclusively in the flowers and leaves of the plants Digitalis purpurea, Digitalis orientalis and Digitalis lanata (foxgloves), where it is attached to sugars, to form the glycosides (e.g. Lanatoside C).